22478387 has 12 divisors (see below), whose sum is σ = 24085296. Its totient is φ = 20971440.

The previous prime is 22478381. The next prime is 22478399. The reversal of 22478387 is 78387422.

It is not a de Polignac number, because 22478387 - 2⁴ = 22478371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22478381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25193 + ... + 26069.

It is an arithmetic number, because the mean of its divisors is an integer number (2007108).

Almost surely, 2^22478387 is an apocalyptic number.

22478387 is a deficient number, since it is larger than the sum of its proper divisors (1606909).

22478387 is an equidigital number, since it uses as much as digits as its factorization.

22478387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 967 counting only the distinct ones).

The product of its digits is 150528, while the sum is 41.

The square root of 22478387 is about 4741.1377326545. The cubic root of 22478387 is about 282.2203858757.

The spelling of 22478387 in words is "twenty-two million, four hundred seventy-eight thousand, three hundred eighty-seven".